Showing papers by "Wai-Choong Wong published in 2002"
07 Nov 2002
TL;DR: The proposed enhanced fuzzy-DSR protocol (EFDSR) supports priority differentiation through its fuzzy engine intake of three routing metrics and improves overall network performance through a special "link state predictive dynamic routing" (LSPDR) technique.
Abstract: A fuzzy-decision-based protocol developed on top of the classical dynamic source routing (DSR) protocol is proposed with support for prioritised service differentiated packet routing and treats all input routing metrics more fairly. The proposed enhanced fuzzy-DSR protocol (EFDSR) supports priority differentiation through its fuzzy engine intake of three routing metrics and improves overall network performance through a special "link state predictive dynamic routing" (LSPDR) technique.
48 citations
25 Nov 2002
TL;DR: A new scheme AODV-RR (Ad Hoc On-demand Distance Vector Protocol with Redundant Routes) with improved robustness is proposed with the aim of increasing throughput and minimizing delay of MANET protocols.
Abstract: We first explore route redundancy mechanisms as means to minimize route discovery latencies of MANET protocols. We propose a new scheme AODV-RR (Ad Hoc On-demand Distance Vector Protocol with Redundant Routes) with improved robustness. The presence of redundant routes allows provision of immediate alternative routes to salvage time-critical traffic flows upon link failures. hence increasing throughput and minimizing delay. Further improvements are obtained by adapting Route Expiry Timeout (RET) to mobility at the expense of slight increase in overhead.
7 citations
25 Nov 2002
TL;DR: A fully adaptive power control (APC) protocol is proposed which is shown to yield significant improvement in system performance.
Abstract: We first propose two power controlled MAC protocols which constrain the transmission power of the current packet depending on the transmission and received powers of the preceding packet. We determine the optimal level of over-compensation for different operating scenarios. Then we propose a fully adaptive power control (APC) protocol which is shown to yield significant improvement in system performance.
7 citations
25 Nov 2002
TL;DR: An improved scheme to maximize system throughput through joint rate and power adaptation with perfect channel information in a multicode CDMA system by specifying suitable boundary conditions is presented, significantly improving search complexity.
Abstract: This paper presents an improved scheme to maximize system throughput through joint rate and power adaptation with perfect channel information in a multicode CDMA system. By specifying suitable boundary conditions, the search range can be narrowed down thereby significantly improving search complexity.